## Tuesday, November 2, 2010

### So Like, How Much More "Dense" Can You Get?

Things to remember:
1cm^3 of water=1mL
Density of water=1.0g/mL OR 1000g/L

The formula for density is Density=mass/volume

Density Units

for solids--> g/cm^3
for liquids--> g/mL

If the density of an object is greater than the density of a liquid, the object will sink
If the density of an object is less than the density of a liquid, the object will float.

Try applying the formula to these practice problems. Remember, D=m/v.

1. An iron bar has a mass of 1225g and a volume of 1.2L. What is the iron bar's density?

2. In a balloon, helium occupies 3.8L with a mass of 4.0g. What is the density of helium?

3. An iron bar has a mass of 250g. If iron's density is 7.86x10^3 g/L, what volume does the bar occupy?

4. A block of beeswax has a volume of 210.0mL and a density of 961g/L. What is the mass of the block?

Fun Fact!!
The density of one brain tissue is 1.05g/mL, which is almost equivalent to the density of water!
How "dense" is that??!?! xD

Written by Jialynn